Frost line depth in Clearwater County, MN

How deep the ground freezes in Clearwater County, MN

71 in. Dig to 71 in, just below the frost. Nearest NOAA station: Fosston 1 E, 16.5 mi.

Your building department sets the legal frost line depth (IRC Table R301.2(1)); footings must go below it (R403.1.4.1). Call them before you dig.

Code depth · Snow